东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (9): 1346-1349.DOI: 10.12068/j.issn.1005-3026.2014.09.029

• 资源与土木工程 • 上一篇    下一篇

煤的挥发分对高磷鲕状赤铁矿直接还原焙烧的影响

曹允业，孙体昌，高恩霞，徐承焱   

  1. (北京科技大学 金属矿山高效开采与安全教育部重点实验室， 北京100083)
  • 收稿日期:2013-07-15 修回日期:2013-07-15 出版日期:2014-09-15 发布日期:2014-04-11
  • 通讯作者: 曹允业
  • 作者简介:曹允业(1987-)，男，山东临沂人，北京科技大学博士研究生；孙体昌(1958-)，男，河北保定人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金重点资助项目(51134002).

Effects of Volatile Component in Coal on HighPhosphorus Oolitic Hematite in Direct Reduction Roasting Process

CAO Yunye， SUN Tichang， GAO Enxia， XU Chengyan   

  1. Key Laboratory of HighEfficient Mining and Safety of Metal Mines， Ministry of Education， University of Science and Technology Beijing， Beijing 100083， China.
  • Received:2013-07-15 Revised:2013-07-15 Online:2014-09-15 Published:2014-04-11
  • Contact: SUN Tichang
  • About author:-
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摘要： 在相同还原焙烧条件和等量添加剂下，系统研究了煤基还原剂中的挥发分对鄂西高磷鲕状赤铁矿在直接还原焙烧过程中对含铁和磷矿物的影响.通过XRD及SEM分析对煤基中挥发分的作用机理进行初步阐述.研究结果表明，煤的挥发分有利于铁回收率的提高，对降低铁产品中磷不利.经过类高温干馏的两种煤种的原煤作为还原剂时，焙烧产品新生成脉石矿物不同，并且原矿中鲕绿泥石和石英等会与含铁矿物发生复杂的化学反应，原矿中含磷矿物大部分仍以氟磷灰石形式存在，但少部分含磷矿物仍会参与还原焙烧的反应.

关键词: 高磷鲕状赤铁矿, 直接还原焙烧, 挥发分, 固定碳, 还原剂

Abstract: Under the same reduction roasting condition and quantity of additive， a systematic research on the effect of volatile component in coalradicle reductant on high phosphorusoolitic hematite of Western Hubei in direct reduction roasting process was done， specifically on minerals containing iron and phosphorus. This study tries to elaborate preliminarily on the mechanism of volatile component in coalradicle by XRD and SEM. The results show that volatile component in coal is conducive to the increase of iron recovery while adverse to the decrease of phosphorus. Gangue minerals newly generated in roasted product are different when using two types of raw coals processed by dry distillation at high temperature as reductants. Moreover， complex reactions occur between ironcontaining minerals and chamosite or quartz in raw ore. As a result， most phosphoruscontaining minerals in raw ore still exist in the form of fluorapatite， but some will still take part in reduction roasting reaction.

Key words: highphosphorus oolitic hematite, direct reduction roasting, volatile, fixed carbon, reductant

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